CVE-2021-42887
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request...
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
- Record
CVE-2021-42887- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
- Record
CVE-2021-42887- Updated
- 2026-11-02
EUVDEUVD-2021-29842 No score
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
- Record
EUVD-2021-29842- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fjcg-55pq-vx59
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request...
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
- Record
GHSA-fjcg-55pq-vx59- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | TOTOLINK EX1200T 4.1.2cu.5215 - Authentication Bypass |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42887 is a critical vulnerability (CVSS 9.8) in Totolink Ex1200t Firmware, published June 3, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 44.3%, the 98th percentile. No source names a fixed version.